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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1>Hello Suc</h1>
    <h2></h2>
    <script>
        // document.addEventListener('DOMContentLoaded',function(){
        //     alert(window.uname)
        // });
        function fn(user){
            document.querySelector('h2').innerHTML=user.name
        }
    </script>
</body>
</html>